Northbrook City Area Code List
| Area Codes | Country | State | City | Time Zone | Operating |
|---|---|---|---|---|---|
| 224 | US | Illinois - IL | Northbrook | Central | Details |
| 312 | US | Illinois - IL | Northbrook | Central | Details |
| 343 | Canada | Ontario | Northbrook | Eastern | Details |
| 613 | Canada | Ontario | Northbrook | Eastern | Details |
| 630 | US | Illinois - IL | Northbrook | Central | Details |
| 708 | US | Illinois - IL | Northbrook | Central | Details |
| 815 | US | Illinois - IL | Northbrook | Central | Details |
| 847 | US | Illinois - IL | Northbrook | Central | Details |